Herrmann r i c h t e r



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,gisten @mail Letters Patent No. 87,972, dated .Ma/rch 16, 1869.

ne Schedule to in these Letters Patent and making part of the sama.

To all whom it may concer-n:

Be it known that I, HERRMANN RICHTER, of the city, county, and State ofNew York, have invented a new and useful Improvement in Gras-Pliers, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawing, form'- ingr part of thisspecification, and which represents a partly sectional longitudinal viewof luy-improved gaspliers.

My improvement in gas-pliers consists in a lever, or handle, having thegriping-tooth made in one piece with it, and a screw-thread cut upon it,for adjustment of the outer clip, or hook, in combination with a nut,arranged to lit said screw-thread, and carrying, or having connectedwith it, a longitudinally-sliding block, or sleeve,`to which the hook,having a spring applied to its back, is hinged.

By this combination, or arrangement of parts, an independent screw isdispensed with, and a general simplicity attained, combined witheiiciency, and facility for operating and adjusting the pliers by onehand,

which, together with other advantages, unite to give to the pliers anovel and most serviceable character. Referring to the accompanyingdrawing- A represents the handle of the pliers formed at its inner endwith a tooth, B, and having cut upon it, immediately in rear of thetofth, a screwthread,-O. Upon this screw-thread is fitted a milled nut,D, which serves to carry, by a guide-pin, a, fitting an annular groove,b, an adjustable or sliding block, E, that is provided with an outertooth, or hook F, pivoted or hinged as at c, and acted upon by anadjustable spring, d, at its'back, to restrict its backward movement,said hook, or outer tooth, operating conjointly with the inner tooth, toeffect the necessary1 gripe on the pipe.

By rotating the nut D in reverse directions, a reciprocating movement isimparted to the block E, tc

effect the necessary adjustment and'bite, or hold of the pliers on thepipe, said block being restrained from turning with thenut, by aset-screw, e, passing through the block, and sliding within or along alongitudinal groove, j, cut in the handle.

The instrument is operated, after gripe on the pipe has been effected,by turning the handle, as indicated by the arrow x, swinging the handleback, and repeating the action as often as necessary. p

A gas-plier thus constructed, combines great simplicity with eciency,and forms a powerful and solid instrument, particularly adapted to heavywork, and always ready for use.

It may be entirely worked with or by one hand, that is, adjusted toeieot gripe by the thumb of the hand which is employed to swing or workthe-instrument, and may be used in every nook and corner.

-An independent screw, to eect adjustment, is dispensed with, and thehandle, screw, and inner tooth, all made in one piece, which cheapensconstruction and adds to eiciency. i

But two sizes of such pliers are sucient for most or all sizes ofgas-pipe. Said pliers, also, are not liable to get cnt of order, orbecome useless, it only being necessary occasionally to grind the edgeof the tooth B, which cuts into the pipe.

What is here claimed, and desired to be secured by Letters Patent, is-

The sliding block E, carrying the pivoted or hinged hook F, and itsspring d, ih combination with the rotating nut D and screw-thread C, onthe handle A, all constructed, arranged, and operating as shown anddescribed.l

HERRMANN RICHTER. Witnesses:

D. W. BROWN, HENRY PALMER.

